thodg/libgit2/src/cache.h

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• Hash : a14163a7
  Author :
  Date : 2013-04-22T17:30:49
  

  cache: Shared meter for memory usage

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• src/cache.h

• /*
   * Copyright (C) the libgit2 contributors. All rights reserved.
   *
   * This file is part of libgit2, distributed under the GNU GPL v2 with
   * a Linking Exception. For full terms see the included COPYING file.
   */
  #ifndef INCLUDE_cache_h__
  #define INCLUDE_cache_h__
  
  #include "git2/common.h"
  #include "git2/oid.h"
  #include "git2/odb.h"
  
  #include "thread-utils.h"
  #include "oidmap.h"
  
  enum {
  	GIT_CACHE_STORE_ANY = 0,
  	GIT_CACHE_STORE_RAW = 1,
  	GIT_CACHE_STORE_PARSED = 2
  };
  
  typedef struct {
  	git_oid    oid;
  	int16_t    type;  /* git_otype value */
  	uint16_t   flags; /* GIT_CACHE_STORE value */
  	size_t     size;
  	git_atomic refcount;
  } git_cached_obj;
  
  typedef struct {
  	git_oidmap *map;
  	git_mutex   lock;
  	int64_t     used_memory;
  } git_cache;
  
  extern bool git_cache__enabled;
  extern int64_t git_cache__max_storage;
  
  int git_cache_set_max_object_size(git_otype type, size_t size);
  
  int git_cache_init(git_cache *cache);
  void git_cache_free(git_cache *cache);
  
  void *git_cache_store_raw(git_cache *cache, git_odb_object *entry);
  void *git_cache_store_parsed(git_cache *cache, git_object *entry);
  
  git_odb_object *git_cache_get_raw(git_cache *cache, const git_oid *oid);
  git_object *git_cache_get_parsed(git_cache *cache, const git_oid *oid);
  void *git_cache_get_any(git_cache *cache, const git_oid *oid);
  
  GIT_INLINE(size_t) git_cache_size(git_cache *cache)
  {
  	return (size_t)kh_size(cache->map);
  }
  
  GIT_INLINE(void) git_cached_obj_incref(void *_obj)
  {
  	git_cached_obj *obj = _obj;
  	git_atomic_inc(&obj->refcount);
  }
  
  void git_cached_obj_decref(void *_obj);
  
  #endif
  

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